Oops: general protection fault, probably for non-canonical address 0xdffffc0000000028: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000140-0x0000000000000147] CPU: 0 UID: 0 PID: 5334 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 d0 d2 79 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000fc8ed20 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffffff8bac209e RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8bac209e RDI: 0000000000000028 RBP: ffffffff83f9648a R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1006a879a0 R12: 0000000000000000 R13: 0000000000000140 R14: 0000000000000140 R15: 0000000000000001 FS: 00007ff6780986c0(0000) GS:ffff88808c894000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f33e2694000 CR3: 000000001f091000 CR4: 0000000000352ef0 Call Trace: __kasan_check_byte+0x12/0x40 mm/kasan/common.c:573 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x84/0x350 kernel/locking/lockdep.c:5842 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158 spin_lock include/linux/spinlock.h:342 [inline] detach_extent_buffer_folio+0xda/0x910 fs/btrfs/extent_io.c:2911 btrfs_release_extent_buffer_folios+0x68/0x430 fs/btrfs/extent_io.c:2971 release_extent_buffer+0x16b/0x240 fs/btrfs/extent_io.c:3679 btrfs_force_cow_block+0x1094/0x2450 fs/btrfs/ctree.c:592 btrfs_cow_block+0x3c4/0xa90 fs/btrfs/ctree.c:699 btrfs_search_slot+0xd13/0x2d20 fs/btrfs/ctree.c:2112 btrfs_truncate_inode_items+0x49c/0x23c0 fs/btrfs/inode-item.c:498 btrfs_truncate fs/btrfs/inode.c:7933 [inline] btrfs_setsize fs/btrfs/inode.c:5459 [inline] btrfs_setattr+0xb7b/0x12a0 fs/btrfs/inode.c:5494 notify_change+0xc1a/0xf40 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 handle_truncate fs/namei.c:4307 [inline] do_open fs/namei.c:4703 [inline] path_openat+0x2f89/0x3860 fs/namei.c:4858 do_file_open+0x23e/0x4a0 fs/namei.c:4887 do_sys_openat2+0x113/0x200 fs/open.c:1364 do_sys_open fs/open.c:1370 [inline] __do_sys_creat fs/open.c:1448 [inline] __se_sys_creat fs/open.c:1442 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1442 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff67719ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff678097fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ff677416090 RCX: 00007ff67719ce59 RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000200000000040 RBP: 00007ff677232d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff677416128 R14: 00007ff677416090 R15: 00007ffdac3d4958 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 d0 d2 79 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000fc8ed20 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffffff8bac209e RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8bac209e RDI: 0000000000000028 RBP: ffffffff83f9648a R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1006a879a0 R12: 0000000000000000 R13: 0000000000000140 R14: 0000000000000140 R15: 0000000000000001 FS: 00007ff6780986c0(0000) GS:ffff88808c894000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f33e2694000 CR3: 000000001f091000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 0f 1f 40 00 nopl 0x0(%rax) 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 0f 1f 40 d6 nopl -0x2a(%rax) 18: 48 c1 ef 03 shr $0x3,%rdi 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df * 26: 0f b6 04 07 movzbl (%rdi,%rax,1),%eax <-- trapping instruction 2a: 3c 08 cmp $0x8,%al 2c: 0f 92 c0 setb %al 2f: e9 d0 d2 79 09 jmp 0x979d304 34: cc int3 35: 66 data16 36: 66 data16 37: 66 data16 38: 66 data16 39: 66 data16 3a: 66 data16 3b: 2e cs